error: struct literals are not allowed here --> $DIR/struct-literal-restrictions-in-lamda.rs:12:14 | LL | while || Foo { | ______________^ LL | | x: 3 LL | | }.hi() { | |_____^ | help: surround the struct literal with parentheses | LL ~ while || (Foo { LL | x: 3 LL ~ }).hi() { | error[E0308]: mismatched types --> $DIR/struct-literal-restrictions-in-lamda.rs:12:11 | LL | while || Foo { | ___________^ LL | | x: 3 LL | | }.hi() { | |__________^ expected `bool`, found closure | = note: expected type `bool` found closure `{closure@$DIR/struct-literal-restrictions-in-lamda.rs:12:11: 12:13}` help: use parentheses to call this closure | LL ~ while (|| Foo { LL | x: 3 LL ~ }.hi())() { | error: aborting due to 2 previous errors For more information about this error, try `rustc --explain E0308`.